The Only Time You Should Use Polymorphism
![](https://i.ytimg.com/vi/SeN1s65tRHY/mqdefault.jpg)
11:56
Depend on Abstractions not Concretions (Framework)
![](https://i.ytimg.com/vi/FdFBYUQCuHQ/mqdefault.jpg)
13:31
Covariance and Contravariance
![](https://i.ytimg.com/vi/Ht0anZiDrBs/mqdefault.jpg)
18:56
Why Most Programmers DON'T Last
![](https://i.ytimg.com/vi/-AzSRHiV9Cc/mqdefault.jpg)
5:28
The 3 Laws of Writing Readable Code
![](https://i.ytimg.com/vi/C3B5IIlt4-0/mqdefault.jpg)
9:10
Only Use Inheritance If You Want Both of These
![](https://i.ytimg.com/vi/EcFVTgRHJLM/mqdefault.jpg)
27:21
Factory Method Pattern – Design Patterns (ep 4)
![](https://i.ytimg.com/vi/0McLoZ0yntM/mqdefault.jpg)
13:22
Trump Pretends to Be Christian at National Prayer Breakfast & Guillermo Talks to Super Bowl Players
![](https://i.ytimg.com/vi/B_HR2R3xsnQ/mqdefault.jpg)
8:40